Registering device for lithographic presses.



UNITED STATES PATENT OFFICE.

cnARLES WAGNER, 0F GRANTWOOD, NEW JERSEY, AND AUGUST HoRMEL, OF NEW YORK, N. Y.

REGISTERING DEVICE FOR LITI-IQGRiLPI-IIC PRESSES.

Specification of Letters Patent. Patented Sept, 12, 1916.

Application filed November 13, 1915. Serial No. 61,207.

To all whom it may concern:

Be it known that we, CHARLES VVAGNER, a citizen of the United States, residing at Grantwood, county of Bergen, and State of New Jersey, and AUGUST HORMEL, a citizen of the United States, residing at New York city, county and State of New York, have invented certain new and useful Improvements in Registering Devices for Lithographic Presses, of which the following is a specification.

This invention relates to a device for accurately registering the successive stones of a common group, in a lithographic press, so that the successive impressions from said stones will register accurately in the print.

In the accompanying drawing: Figure 1 is a plan partly in section of a registering device embodying our invention; Fig. 2 a cross section on line 22, Fig. 1, and Fig. 3 a similar section on an enlarged scale through part of the device.

The lithographic press is furnished as usual with a table 1, having a central opening for the reception of a lithographic stone 2, and a pair of racks 3, for receiving the pinions of the transfer roller carriage (not shown).

Alongv one of the sides of table '1 there extends, a longitudinal rail or support 4, which is apertured for the reception of the upper reduced ends 5 of a pair of pins 6, the lower cylindrical ends of which are loosely accommodated within corresponding bores 7 of the table. Each of these bores opens into a vent 8, which prevents suction when the pins are drawn out of their sockets by the re-' moval of rail 4,- and likewise prevents the accumulation of dirt within the sockets. To rail 4, is affixed one leaf of a hinge 9, the other leaf of which carries a pair of clamping jaws 10, 11 connected by means of a screw'12. -Handles 13 having tapped sockets 14 that receive the upper threaded ends of pins 5, permit the entire device to be" raised oil" and removed from the table.

Jaws 10, 11 are adapted to engage one edge of a transparent celluloid or similar sheet 15, which corresponds in size, substantially to that of stone 2, and 'may, by the means described, be folded over the same.

The several stones pertaining to one group and adapted to form the successive impressions of one and the same print, are provided with corresponding registering marks 16, placed along their Sides. Now in order to exactly gage these stones, the transparent sheet 15 is folded over the first stone, and the registering marks. appearing on the stone, and clearly visible through the sheet, are traced or transferred through the latter as indicated at 17. When now, the second stone is placed into the press, it is so gaged, that its registering marks will become alined with the 'marks 17 of sheet 15, which will insure the accurate placing of the stone during which operation, the sheet may be thrown up on the hinge to obtain ready access to the stone. This operation is repeated for each of the succeeding stones. After the proper alinement of any one stone has been effected, the device is lifted off the table by the withdrawal of the pins 6 from bores 7. Whenthe several stones of any one group have finished their work, the marks on sheet 15 are wiped out, so that the sheet is adapted to receive marks that register with the first stone of the next job.

It will be seen that by our invention, the successive stones of a lithographic press may be quickly gaged in a simple and accurate manner.

We claim:

1'. A registering device for lithographic presses, comprising a rail, means for remorably securing said rail to a lithographic table, a pair of clamping jaws hinged to the rail, and a transparent sheet engaged by said jaws and adapted to. be projected over a lithographic stone supported on said lithographic table.

2. A registering device for lithographic presses comprising a table having bores, a rail, pins depending from the rail and engaging said bores, a pair of clamping jaws hinged to the rail, and a transparent sheet engaged by the jaws and adapted to be projected over a lithographic stone supported on said table.

CHARLES WAGNER. AUGUST HORMEL. 

